Enerpac Cube Jack passes test

4 November 2019


Enerpac has completed overload testing of the SCJ-Series Self-Locking Cube Jack, a new compact and portable hydraulic solution for incremental lifting and lowering of heavy loads. Four Cube Jacks were used to lift a 226.5USt (205.6t) test load up to 2m.

The SCJ-50 cube jack is capable of lifting 50USt. For the 226.5USt load test, four SCJ-50 cube jacks were connected together via a split-flow pump to provide synchronous lifting and lowering of the four cube jacks.

“The SCJ-50 Cube Jack uses a base lifting frame and self-aligning, lightweight steel cribbing blocks to provide high-capacity and stabilised lifting – offering a safer, controlled and more efficient alternative to climbing jacks with wooden cribbing,” said Enerpac.

The incremental cube jack system mechanically locks the load as each cribbing block is manually added or removed, instead of being held by hydraulic pressure. Once the mechanical lock engages, the lift cylinder retracts, and another cribbing block can be added or removed. “This safer, simplified operation sequence can be accomplished with 50% fewer cycles than climbing jacks, yielding a substantial increase in productivity as well,” the manufacturer said.

 The SCJ-50 Cube Jack operates with standard 700 bar hydraulic pressure and is compatible with standard Enerpac pumps.

 “The overload test demonstrated the power and ease of use of the SCJ-50 Cube Jack for lifting large heavy loads,” says Pete Crisci, product line director, Enerpac Heavy Lifting Technology. “We also subjected the cube jacks to a 1.5% side load at its maximum 2m height to successfully demonstrate the stability of the cube jack even with an oversize load.”